I don't think any pump manufacturers do anything about winterizing their product. You could call your selected vendor and ask...
If you want to winterize it and leave it in a non-operating condition, there might be enough drain plugs that you can remove to get the liquid out and enough vent plugs to let some air in, so you can drain every chamber. ... which on an AODD could be quite a lot of work.
If you need the pump to be operable in winter, or you don't want to bother with a lot of plugging and unplugging, you could build an insulated box around the entire assembly, and put a suitable heater in the box. If the flow is high or the winters get cold where you are, you may need a pretty big heater. Also build in an appropriate louver so the exhaust air can get out of the box without too much snow getting in.
Mike Halloran
Pembroke Pines, FL, USA